Page MenuHomeFreeBSD
Differential D17874 Diff 51926 lib/libvmmapi/amd64/vmmapi_amd64.c

Changeset View

Standalone View

View Options

lib/libvmmapi/amd64/vmmapi_amd64.c

  • This file was added.
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2011 NetApp, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/_iovec.h>
#include <sys/cpuset.h>
#include <x86/segments.h>
#include <machine/specialreg.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <libutil.h>
#include <machine/vmm.h>
#include <machine/vmm_dev.h>
#include <vmmapi.h>
#include "vmmapi_internal.h"
#include "vmctx_amd64.h"
#define MB (1024 * 1024UL)
#define GB (1024 * 1024 * 1024UL)
/*
* Size of the guard region before and after the virtual address space
* mapping the guest physical memory. This must be a multiple of the
* superpage size for performance reasons.
*/
#define VM_MMAP_GUARD_SIZE (4 * MB)
#define PROT_RW (PROT_READ | PROT_WRITE)
#define PROT_ALL (PROT_READ | PROT_WRITE | PROT_EXEC)
struct vmctx *
vm_open(const char *name)
{
struct vmctx *vm;
vm = malloc(sizeof(struct vmctx) + strlen(name) + 1);
assert(vm != NULL);
vm->fd = -1;
jhbUnsubmitted
Not Done
Inline Actions

This function doesn't seem MD. It doesn't need to be in vmmapi.h, but it could be in an internal MI header in lib/libvmmapi.

jhb: This function doesn't seem MD. It doesn't need to be in vmmapi.h, but it could be in an…
alexandru.elisei_gmail.comAuthorUnsubmitted
Done
Inline Actions

I'll can do that.

alexandru.elisei_gmail.com: I'll can do that.
vm->memflags = 0;
vm->lowmem_limit = 3 * GB;
vm->name = (char *)(vm + 1);
strcpy(vm->name, name);
if ((vm->fd = vm_device_open(vm->name)) < 0)
goto err;
return (vm);
err:
vm_destroy(vm);
return (NULL);
}
uint32_t
vm_get_lowmem_limit(struct vmctx *ctx)
{
return (ctx->lowmem_limit);
}
void
vm_set_lowmem_limit(struct vmctx *ctx, uint32_t limit)
{
ctx->lowmem_limit = limit;
}
void
vm_set_memflags(struct vmctx *ctx, int flags)
{
ctx->memflags = flags;
}
int
vm_get_memflags(struct vmctx *ctx)
{
return (ctx->memflags);
}
/*
* Map segment 'segid' starting at 'off' into guest address range [gpa,gpa+len).
*/
int
vm_mmap_memseg(struct vmctx *ctx, vm_paddr_t gpa, int segid, vm_ooffset_t off,
size_t len, int prot)
{
struct vm_memmap memmap;
int error, flags;
memmap.gpa = gpa;
memmap.segid = segid;
memmap.segoff = off;
memmap.len = len;
memmap.prot = prot;
memmap.flags = 0;
if (ctx->memflags & VM_MEM_F_WIRED)
memmap.flags |= VM_MEMMAP_F_WIRED;
/*
* If this mapping already exists then don't create it again. This
* is the common case for SYSMEM mappings created by bhyveload(8).
*/
error = vm_mmap_getnext(ctx, &gpa, &segid, &off, &len, &prot, &flags);
if (error == 0 && gpa == memmap.gpa) {
if (segid != memmap.segid || off != memmap.segoff ||
prot != memmap.prot || flags != memmap.flags) {
errno = EEXIST;
return (-1);
} else {
return (0);
}
}
error = ioctl(ctx->fd, VM_MMAP_MEMSEG, &memmap);
return (error);
}
int
vm_mmap_getnext(struct vmctx *ctx, vm_paddr_t *gpa, int *segid,
vm_ooffset_t *segoff, size_t *len, int *prot, int *flags)
{
struct vm_memmap memmap;
int error;
bzero(&memmap, sizeof(struct vm_memmap));
memmap.gpa = *gpa;
error = ioctl(ctx->fd, VM_MMAP_GETNEXT, &memmap);
if (error == 0) {
*gpa = memmap.gpa;
*segid = memmap.segid;
*segoff = memmap.segoff;
*len = memmap.len;
*prot = memmap.prot;
*flags = memmap.flags;
}
return (error);
}
/*
* Return 0 if the segments are identical and non-zero otherwise.
*
* This is slightly complicated by the fact that only device memory segments
* are named.
*/
static int
cmpseg(size_t len, const char *str, size_t len2, const char *str2)
{
if (len == len2) {
if ((!str && !str2) || (str && str2 && !strcmp(str, str2)))
return (0);
}
return (-1);
}
static int
vm_alloc_memseg(struct vmctx *ctx, int segid, size_t len, const char *name)
{
struct vm_memseg memseg;
size_t n;
int error;
/*
* If the memory segment has already been created then just return.
* This is the usual case for the SYSMEM segment created by userspace
* loaders like bhyveload(8).
*/
error = vm_get_memseg(ctx, segid, &memseg.len, memseg.name,
sizeof(memseg.name));
if (error)
return (error);
if (memseg.len != 0) {
if (cmpseg(len, name, memseg.len, VM_MEMSEG_NAME(&memseg))) {
errno = EINVAL;
return (-1);
} else {
return (0);
}
}
bzero(&memseg, sizeof(struct vm_memseg));
memseg.segid = segid;
memseg.len = len;
if (name != NULL) {
n = strlcpy(memseg.name, name, sizeof(memseg.name));
if (n >= sizeof(memseg.name)) {
errno = ENAMETOOLONG;
return (-1);
}
}
error = ioctl(ctx->fd, VM_ALLOC_MEMSEG, &memseg);
return (error);
}
int
vm_get_memseg(struct vmctx *ctx, int segid, size_t *lenp, char *namebuf,
size_t bufsize)
{
struct vm_memseg memseg;
size_t n;
int error;
memseg.segid = segid;
error = ioctl(ctx->fd, VM_GET_MEMSEG, &memseg);
if (error == 0) {
*lenp = memseg.len;
n = strlcpy(namebuf, memseg.name, bufsize);
if (n >= bufsize) {
errno = ENAMETOOLONG;
error = -1;
}
}
return (error);
}
static int
setup_memory_segment(struct vmctx *ctx, vm_paddr_t gpa, size_t len, char *base)
{
char *ptr;
int error, flags;
/* Map 'len' bytes starting at 'gpa' in the guest address space */
error = vm_mmap_memseg(ctx, gpa, VM_SYSMEM, gpa, len, PROT_ALL);
if (error)
return (error);
flags = MAP_SHARED | MAP_FIXED;
if ((ctx->memflags & VM_MEM_F_INCORE) == 0)
flags |= MAP_NOCORE;
/* mmap into the process address space on the host */
ptr = mmap(base + gpa, len, PROT_RW, flags, ctx->fd, gpa);
if (ptr == MAP_FAILED)
return (-1);
return (0);
}
int
vm_setup_memory(struct vmctx *ctx, size_t memsize, enum vm_mmap_style vms)
{
size_t objsize, len;
vm_paddr_t gpa;
char *baseaddr, *ptr;
int error;
assert(vms == VM_MMAP_ALL);
/*
* If 'memsize' cannot fit entirely in the 'lowmem' segment then
* create another 'highmem' segment above 4GB for the remainder.
*/
if (memsize > ctx->lowmem_limit) {
ctx->lowmem = ctx->lowmem_limit;
ctx->highmem = memsize - ctx->lowmem_limit;
objsize = 4*GB + ctx->highmem;
} else {
ctx->lowmem = memsize;
ctx->highmem = 0;
objsize = ctx->lowmem;
}
error = vm_alloc_memseg(ctx, VM_SYSMEM, objsize, NULL);
if (error)
return (error);
/*
* Stake out a contiguous region covering the guest physical memory
* and the adjoining guard regions.
*/
len = VM_MMAP_GUARD_SIZE + objsize + VM_MMAP_GUARD_SIZE;
ptr = mmap(NULL, len, PROT_NONE, MAP_GUARD | MAP_ALIGNED_SUPER, -1, 0);
if (ptr == MAP_FAILED)
return (-1);
baseaddr = ptr + VM_MMAP_GUARD_SIZE;
if (ctx->highmem > 0) {
gpa = 4*GB;
len = ctx->highmem;
error = setup_memory_segment(ctx, gpa, len, baseaddr);
if (error)
return (error);
}
if (ctx->lowmem > 0) {
gpa = 0;
len = ctx->lowmem;
error = setup_memory_segment(ctx, gpa, len, baseaddr);
if (error)
return (error);
}
ctx->baseaddr = baseaddr;
return (0);
}
/*
* Returns a non-NULL pointer if [gaddr, gaddr+len) is entirely contained in
* the lowmem or highmem regions.
*
* In particular return NULL if [gaddr, gaddr+len) falls in guest MMIO region.
* The instruction emulation code depends on this behavior.
*/
void *
vm_map_gpa(struct vmctx *ctx, vm_paddr_t gaddr, size_t len)
{
if (ctx->lowmem > 0) {
if (gaddr < ctx->lowmem && len <= ctx->lowmem &&
gaddr + len <= ctx->lowmem)
return (ctx->baseaddr + gaddr);
}
if (ctx->highmem > 0) {
if (gaddr >= 4*GB) {
if (gaddr < 4*GB + ctx->highmem &&
len <= ctx->highmem &&
gaddr + len <= 4*GB + ctx->highmem)
return (ctx->baseaddr + gaddr);
}
}
return (NULL);
}
size_t
vm_get_lowmem_size(struct vmctx *ctx)
{
return (ctx->lowmem);
}
size_t
vm_get_highmem_size(struct vmctx *ctx)
{
return (ctx->highmem);
}
void *
vm_create_devmem(struct vmctx *ctx, int segid, const char *name, size_t len)
{
char pathname[MAXPATHLEN];
size_t len2;
char *base, *ptr;
int fd, error, flags;
fd = -1;
ptr = MAP_FAILED;
if (name == NULL || strlen(name) == 0) {
errno = EINVAL;
goto done;
}
error = vm_alloc_memseg(ctx, segid, len, name);
if (error)
goto done;
strlcpy(pathname, "/dev/vmm.io/", sizeof(pathname));
strlcat(pathname, ctx->name, sizeof(pathname));
strlcat(pathname, ".", sizeof(pathname));
strlcat(pathname, name, sizeof(pathname));
fd = open(pathname, O_RDWR);
if (fd < 0)
goto done;
/*
* Stake out a contiguous region covering the device memory and the
* adjoining guard regions.
*/
len2 = VM_MMAP_GUARD_SIZE + len + VM_MMAP_GUARD_SIZE;
base = mmap(NULL, len2, PROT_NONE, MAP_GUARD | MAP_ALIGNED_SUPER, -1,
0);
if (base == MAP_FAILED)
goto done;
flags = MAP_SHARED | MAP_FIXED;
if ((ctx->memflags & VM_MEM_F_INCORE) == 0)
flags |= MAP_NOCORE;
/* mmap the devmem region in the host address space */
ptr = mmap(base + VM_MMAP_GUARD_SIZE, len, PROT_RW, flags, fd, 0);
done:
if (fd >= 0)
close(fd);
return (ptr);
}
int
vm_set_desc(struct vmctx *ctx, int vcpu, int reg,
uint64_t base, uint32_t limit, uint32_t access)
{
int error;
struct vm_seg_desc vmsegdesc;
bzero(&vmsegdesc, sizeof(vmsegdesc));
vmsegdesc.cpuid = vcpu;
vmsegdesc.regnum = reg;
vmsegdesc.desc.base = base;
vmsegdesc.desc.limit = limit;
vmsegdesc.desc.access = access;
error = ioctl(ctx->fd, VM_SET_SEGMENT_DESCRIPTOR, &vmsegdesc);
return (error);
}
int
vm_get_desc(struct vmctx *ctx, int vcpu, int reg,
uint64_t *base, uint32_t *limit, uint32_t *access)
{
int error;
struct vm_seg_desc vmsegdesc;
bzero(&vmsegdesc, sizeof(vmsegdesc));
vmsegdesc.cpuid = vcpu;
vmsegdesc.regnum = reg;
error = ioctl(ctx->fd, VM_GET_SEGMENT_DESCRIPTOR, &vmsegdesc);
if (error == 0) {
*base = vmsegdesc.desc.base;
*limit = vmsegdesc.desc.limit;
*access = vmsegdesc.desc.access;
}
return (error);
}
int
vm_get_seg_desc(struct vmctx *ctx, int vcpu, int reg, struct seg_desc *seg_desc)
{
int error;
error = vm_get_desc(ctx, vcpu, reg, &seg_desc->base, &seg_desc->limit,
&seg_desc->access);
return (error);
}
int
vm_inject_exception(struct vmctx *ctx, int vcpu, int vector, int errcode_valid,
uint32_t errcode, int restart_instruction)
{
struct vm_exception exc;
exc.cpuid = vcpu;
exc.vector = vector;
exc.error_code = errcode;
exc.error_code_valid = errcode_valid;
exc.restart_instruction = restart_instruction;
return (ioctl(ctx->fd, VM_INJECT_EXCEPTION, &exc));
}
int
vm_apicid2vcpu(struct vmctx *ctx, int apicid)
{
/*
* The apic id associated with the 'vcpu' has the same numerical value
* as the 'vcpu' itself.
*/
return (apicid);
}
int
vm_lapic_irq(struct vmctx *ctx, int vcpu, int vector)
{
struct vm_lapic_irq vmirq;
bzero(&vmirq, sizeof(vmirq));
vmirq.cpuid = vcpu;
vmirq.vector = vector;
return (ioctl(ctx->fd, VM_LAPIC_IRQ, &vmirq));
}
int
vm_lapic_local_irq(struct vmctx *ctx, int vcpu, int vector)
{
struct vm_lapic_irq vmirq;
bzero(&vmirq, sizeof(vmirq));
vmirq.cpuid = vcpu;
vmirq.vector = vector;
return (ioctl(ctx->fd, VM_LAPIC_LOCAL_IRQ, &vmirq));
}
int
vm_lapic_msi(struct vmctx *ctx, uint64_t addr, uint64_t msg)
{
struct vm_lapic_msi vmmsi;
bzero(&vmmsi, sizeof(vmmsi));
vmmsi.addr = addr;
vmmsi.msg = msg;
return (ioctl(ctx->fd, VM_LAPIC_MSI, &vmmsi));
}
int
vm_ioapic_assert_irq(struct vmctx *ctx, int irq)
{
struct vm_ioapic_irq ioapic_irq;
bzero(&ioapic_irq, sizeof(struct vm_ioapic_irq));
ioapic_irq.irq = irq;
return (ioctl(ctx->fd, VM_IOAPIC_ASSERT_IRQ, &ioapic_irq));
}
int
vm_ioapic_deassert_irq(struct vmctx *ctx, int irq)
{
struct vm_ioapic_irq ioapic_irq;
bzero(&ioapic_irq, sizeof(struct vm_ioapic_irq));
ioapic_irq.irq = irq;
return (ioctl(ctx->fd, VM_IOAPIC_DEASSERT_IRQ, &ioapic_irq));
}
int
vm_ioapic_pulse_irq(struct vmctx *ctx, int irq)
{
struct vm_ioapic_irq ioapic_irq;
bzero(&ioapic_irq, sizeof(struct vm_ioapic_irq));
ioapic_irq.irq = irq;
return (ioctl(ctx->fd, VM_IOAPIC_PULSE_IRQ, &ioapic_irq));
}
int
vm_ioapic_pincount(struct vmctx *ctx, int *pincount)
{
return (ioctl(ctx->fd, VM_IOAPIC_PINCOUNT, pincount));
}
int
vm_isa_assert_irq(struct vmctx *ctx, int atpic_irq, int ioapic_irq)
{
struct vm_isa_irq isa_irq;
bzero(&isa_irq, sizeof(struct vm_isa_irq));
isa_irq.atpic_irq = atpic_irq;
isa_irq.ioapic_irq = ioapic_irq;
return (ioctl(ctx->fd, VM_ISA_ASSERT_IRQ, &isa_irq));
}
int
vm_isa_deassert_irq(struct vmctx *ctx, int atpic_irq, int ioapic_irq)
{
struct vm_isa_irq isa_irq;
bzero(&isa_irq, sizeof(struct vm_isa_irq));
isa_irq.atpic_irq = atpic_irq;
isa_irq.ioapic_irq = ioapic_irq;
return (ioctl(ctx->fd, VM_ISA_DEASSERT_IRQ, &isa_irq));
}
int
vm_isa_pulse_irq(struct vmctx *ctx, int atpic_irq, int ioapic_irq)
{
struct vm_isa_irq isa_irq;
bzero(&isa_irq, sizeof(struct vm_isa_irq));
isa_irq.atpic_irq = atpic_irq;
isa_irq.ioapic_irq = ioapic_irq;
return (ioctl(ctx->fd, VM_ISA_PULSE_IRQ, &isa_irq));
}
int
vm_isa_set_irq_trigger(struct vmctx *ctx, int atpic_irq,
enum vm_intr_trigger trigger)
{
struct vm_isa_irq_trigger isa_irq_trigger;
bzero(&isa_irq_trigger, sizeof(struct vm_isa_irq_trigger));
isa_irq_trigger.atpic_irq = atpic_irq;
isa_irq_trigger.trigger = trigger;
return (ioctl(ctx->fd, VM_ISA_SET_IRQ_TRIGGER, &isa_irq_trigger));
}
int
vm_inject_nmi(struct vmctx *ctx, int vcpu)
{
struct vm_nmi vmnmi;
bzero(&vmnmi, sizeof(vmnmi));
vmnmi.cpuid = vcpu;
return (ioctl(ctx->fd, VM_INJECT_NMI, &vmnmi));
}
static struct {
const char *name;
int type;
} capstrmap[] = {
{ "hlt_exit", VM_CAP_HALT_EXIT },
{ "mtrap_exit", VM_CAP_MTRAP_EXIT },
{ "pause_exit", VM_CAP_PAUSE_EXIT },
{ "unrestricted_guest", VM_CAP_UNRESTRICTED_GUEST },
{ "enable_invpcid", VM_CAP_ENABLE_INVPCID },
{ 0 }
};
int
vm_capability_name2type(const char *capname)
{
int i;
for (i = 0; capstrmap[i].name != NULL && capname != NULL; i++) {
if (strcmp(capstrmap[i].name, capname) == 0)
return (capstrmap[i].type);
}
return (-1);
}
const char *
vm_capability_type2name(int type)
{
int i;
for (i = 0; capstrmap[i].name != NULL; i++) {
if (capstrmap[i].type == type)
return (capstrmap[i].name);
}
return (NULL);
}
int
vm_get_x2apic_state(struct vmctx *ctx, int vcpu, enum x2apic_state *state)
{
int error;
struct vm_x2apic x2apic;
bzero(&x2apic, sizeof(x2apic));
x2apic.cpuid = vcpu;
error = ioctl(ctx->fd, VM_GET_X2APIC_STATE, &x2apic);
*state = x2apic.state;
return (error);
}
int
vm_set_x2apic_state(struct vmctx *ctx, int vcpu, enum x2apic_state state)
{
int error;
struct vm_x2apic x2apic;
bzero(&x2apic, sizeof(x2apic));
x2apic.cpuid = vcpu;
x2apic.state = state;
error = ioctl(ctx->fd, VM_SET_X2APIC_STATE, &x2apic);
return (error);
}
/*
* From Intel Vol 3a:
* Table 9-1. IA-32 Processor States Following Power-up, Reset or INIT
*/
int
vcpu_reset(struct vmctx *vmctx, int vcpu)
{
int error;
uint64_t rflags, rip, cr0, cr4, zero, desc_base, rdx;
uint32_t desc_access, desc_limit;
uint16_t sel;
zero = 0;
rflags = 0x2;
error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RFLAGS, rflags);
if (error)
goto done;
rip = 0xfff0;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RIP, rip)) != 0)
goto done;
cr0 = CR0_NE;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR0, cr0)) != 0)
goto done;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR3, zero)) != 0)
goto done;
cr4 = 0;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR4, cr4)) != 0)
alexandru.elisei_gmail.comAuthorUnsubmitted
Done
Inline Actions

Why doesn't it use a system call? That way it could be treated like a machine-independent function.

Nitpicking: it doesn't follow the same naming convention as all the other functions in libvmmapi (doesn't have a vm_ prefix).

alexandru.elisei_gmail.com: Why doesn't it use a system call? That way it could be treated like a machine-independent…
goto done;
/*
* CS: present, r/w, accessed, 16-bit, byte granularity, usable
*/
desc_base = 0xffff0000;
desc_limit = 0xffff;
desc_access = 0x0093;
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_CS,
desc_base, desc_limit, desc_access);
if (error)
goto done;
sel = 0xf000;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CS, sel)) != 0)
goto done;
/*
* SS,DS,ES,FS,GS: present, r/w, accessed, 16-bit, byte granularity
*/
desc_base = 0;
desc_limit = 0xffff;
desc_access = 0x0093;
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_SS,
desc_base, desc_limit, desc_access);
if (error)
goto done;
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_DS,
desc_base, desc_limit, desc_access);
if (error)
goto done;
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_ES,
desc_base, desc_limit, desc_access);
if (error)
goto done;
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_FS,
desc_base, desc_limit, desc_access);
if (error)
goto done;
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_GS,
desc_base, desc_limit, desc_access);
if (error)
goto done;
sel = 0;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_SS, sel)) != 0)
goto done;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_DS, sel)) != 0)
goto done;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_ES, sel)) != 0)
goto done;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_FS, sel)) != 0)
goto done;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_GS, sel)) != 0)
goto done;
/* General purpose registers */
rdx = 0xf00;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RAX, zero)) != 0)
goto done;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RBX, zero)) != 0)
goto done;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RCX, zero)) != 0)
goto done;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RDX, rdx)) != 0)
goto done;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RSI, zero)) != 0)
goto done;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RDI, zero)) != 0)
goto done;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RBP, zero)) != 0)
goto done;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RSP, zero)) != 0)
goto done;
/* GDTR, IDTR */
desc_base = 0;
desc_limit = 0xffff;
desc_access = 0;
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_GDTR,
desc_base, desc_limit, desc_access);
if (error != 0)
goto done;
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_IDTR,
desc_base, desc_limit, desc_access);
if (error != 0)
goto done;
/* TR */
desc_base = 0;
desc_limit = 0xffff;
desc_access = 0x0000008b;
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_TR, 0, 0, desc_access);
if (error)
goto done;
sel = 0;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_TR, sel)) != 0)
goto done;
/* LDTR */
desc_base = 0;
desc_limit = 0xffff;
desc_access = 0x00000082;
error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_LDTR, desc_base,
desc_limit, desc_access);
if (error)
goto done;
sel = 0;
if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_LDTR, 0)) != 0)
goto done;
/* XXX cr2, debug registers */
error = 0;
done:
return (error);
}
int
vm_get_hpet_capabilities(struct vmctx *ctx, uint32_t *capabilities)
{
int error;
struct vm_hpet_cap cap;
bzero(&cap, sizeof(struct vm_hpet_cap));
error = ioctl(ctx->fd, VM_GET_HPET_CAPABILITIES, &cap);
if (capabilities != NULL)
*capabilities = cap.capabilities;
return (error);
}
int
vm_get_intinfo(struct vmctx *ctx, int vcpu, uint64_t *info1, uint64_t *info2)
{
struct vm_intinfo vmii;
int error;
bzero(&vmii, sizeof(struct vm_intinfo));
vmii.vcpuid = vcpu;
error = ioctl(ctx->fd, VM_GET_INTINFO, &vmii);
if (error == 0) {
*info1 = vmii.info1;
*info2 = vmii.info2;
}
return (error);
}
int
vm_set_intinfo(struct vmctx *ctx, int vcpu, uint64_t info1)
{
struct vm_intinfo vmii;
int error;
bzero(&vmii, sizeof(struct vm_intinfo));
vmii.vcpuid = vcpu;
vmii.info1 = info1;
error = ioctl(ctx->fd, VM_SET_INTINFO, &vmii);
return (error);
}
int
vm_rtc_write(struct vmctx *ctx, int offset, uint8_t value)
{
struct vm_rtc_data rtcdata;
int error;
bzero(&rtcdata, sizeof(struct vm_rtc_data));
rtcdata.offset = offset;
rtcdata.value = value;
error = ioctl(ctx->fd, VM_RTC_WRITE, &rtcdata);
return (error);
}
int
vm_rtc_read(struct vmctx *ctx, int offset, uint8_t *retval)
{
struct vm_rtc_data rtcdata;
int error;
bzero(&rtcdata, sizeof(struct vm_rtc_data));
rtcdata.offset = offset;
error = ioctl(ctx->fd, VM_RTC_READ, &rtcdata);
if (error == 0)
*retval = rtcdata.value;
return (error);
}
int
vm_rtc_settime(struct vmctx *ctx, time_t secs)
{
struct vm_rtc_time rtctime;
int error;
bzero(&rtctime, sizeof(struct vm_rtc_time));
rtctime.secs = secs;
error = ioctl(ctx->fd, VM_RTC_SETTIME, &rtctime);
return (error);
}
int
vm_rtc_gettime(struct vmctx *ctx, time_t *secs)
{
struct vm_rtc_time rtctime;
int error;
bzero(&rtctime, sizeof(struct vm_rtc_time));
error = ioctl(ctx->fd, VM_RTC_GETTIME, &rtctime);
if (error == 0)
*secs = rtctime.secs;
return (error);
}
int
vm_get_device_fd(struct vmctx *ctx)
{
return (ctx->fd);
}
const char *
vm_get_name(struct vmctx *ctx)
{
return (ctx->name);
}
const cap_ioctl_t *
vm_get_ioctls(size_t *len)
{
cap_ioctl_t *cmds;
/* keep in sync with machine/vmm_dev.h */
static const cap_ioctl_t vm_ioctl_cmds[] = { VM_RUN, VM_SUSPEND, VM_REINIT,
VM_ALLOC_MEMSEG, VM_GET_MEMSEG, VM_MMAP_MEMSEG, VM_MMAP_MEMSEG,
VM_MMAP_GETNEXT, VM_SET_REGISTER, VM_GET_REGISTER,
VM_SET_SEGMENT_DESCRIPTOR, VM_GET_SEGMENT_DESCRIPTOR,
VM_SET_REGISTER_SET, VM_GET_REGISTER_SET,
VM_INJECT_EXCEPTION, VM_LAPIC_IRQ, VM_LAPIC_LOCAL_IRQ,
VM_LAPIC_MSI, VM_IOAPIC_ASSERT_IRQ, VM_IOAPIC_DEASSERT_IRQ,
VM_IOAPIC_PULSE_IRQ, VM_IOAPIC_PINCOUNT, VM_ISA_ASSERT_IRQ,
VM_ISA_DEASSERT_IRQ, VM_ISA_PULSE_IRQ, VM_ISA_SET_IRQ_TRIGGER,
VM_SET_CAPABILITY, VM_GET_CAPABILITY, VM_BIND_PPTDEV,
VM_UNBIND_PPTDEV, VM_MAP_PPTDEV_MMIO, VM_PPTDEV_MSI,
VM_PPTDEV_MSIX, VM_INJECT_NMI, VM_STATS, VM_STAT_DESC,
VM_SET_X2APIC_STATE, VM_GET_X2APIC_STATE,
VM_GET_HPET_CAPABILITIES, VM_GET_GPA_PMAP, VM_GLA2GPA,
VM_GLA2GPA_NOFAULT,
VM_ACTIVATE_CPU, VM_GET_CPUS, VM_SUSPEND_CPU, VM_RESUME_CPU,
VM_SET_INTINFO, VM_GET_INTINFO,
VM_RTC_WRITE, VM_RTC_READ, VM_RTC_SETTIME, VM_RTC_GETTIME,
VM_RESTART_INSTRUCTION, VM_SET_TOPOLOGY, VM_GET_TOPOLOGY };
if (len == NULL) {
cmds = malloc(sizeof(vm_ioctl_cmds));
if (cmds == NULL)
return (NULL);
bcopy(vm_ioctl_cmds, cmds, sizeof(vm_ioctl_cmds));
return (cmds);
}
*len = nitems(vm_ioctl_cmds);
return (NULL);
}